+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15371 Steward (1996 RZ18) Classification: Main-belt Asteroid          SPK-ID: 2015371 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1090643609238303 3.6507e-08   a 2.994932428768839 1.4667e-08 au q 2.66829203741511 1.1366e-07 au i 2.738803674241403 4.916e-06 deg node 171.1608229514617 7.434e-05 deg peri 126.5268450753983 7.7529e-05 deg M 328.2257834170059 2.3134e-05 deg tp 2459563.590331301122 (2021-Dec-15.09033130) 0.00012194 TDB period 1893.123599484688 5.18 1.3907e-05 3.808e-08 d yr n .1901619102408277 1.3969e-09 deg/d Q 3.321572820122566 1.6267e-08 au   Orbit Determination Parameters    # obs. used (total)      1196      data-arc span      10855 days (29.72 yr)      first obs. used      1991-10-07      last obs. used      2021-06-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55606      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 03:48:50   Additional Information  Earth MOID = 1.65325 au   Jupiter MOID = 1.86321 au   T_jup = 3.244  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.41   n/a E2021B10   15371 Steward           Discovered 1996 Sept. 15 by Spacewatch at Kitt Peak. The Steward Observatory, named in memory of Lavinia Steward, is the research organization associated with the department of astronomy of the University of Arizona. Besides operating telescopes at several locations, its faculty, staff and students are leaders in instrumental development and in theoretical studies. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20040713/MPCPages.arc Last Updated: 2004-07-14 [ show close-approach data ] Alternate Designations  1996 RZ18 = 2000 JT13  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jul-26 17:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin